The **FYA-R3219ZX** is a high-performance **7-Segment LED Display** module, typically featuring three digits. It is commonly used in industrial panels, digital clocks, and instrument readouts where high visibility is required. --- ### 1. Technical Specifications Below is a breakdown of the typical electrical characteristics for this component: | Feature | Specification | | :--- | :--- | | **Display Type** | 7-Segment LED | | **Number of Digits** | 3 Digits | | **Circuit Configuration** | Common Anode or Common Cathode (Suffix dependent) | | **Digit Height** | 0.32 inches (8.10 mm) | | **Forward Voltage ($V_F$)** | 1.8V - 2.2V (Red/Green), 3.0V - 3.5V (Blue/White) | | **Forward Current ($I_F$)** | 20mA per segment | | **Peak Wavelength** | Varies by color (e.g., 635nm for High-Efficiency Red) | --- ### 2. Electronic Architecture The internal wiring of the FYA-R3219ZX is designed to minimize the number of pins required to drive three digits simultaneously. * **Multiplexing Layout:** The segments (A, B, C, D, E, F, G, and DP) of all three digits are usually tied together internally. To display a specific number on one digit, you must activate the specific "Common" pin for that digit. * **Pinout Structure:** 1. **Segment Pins:** 8 pins (A-G + Decimal Point). 2. **Digit Select Pins:** 3 pins (one for each digit). * **Polarity:** * **Common Anode (CA):** All LED anodes are connected to a common positive rail; logic "LOW" (0V) turns a segment ON. * **Common Cathode (CC):** All LED cathodes are connected to a common ground; logic "HIGH" (VCC) turns a segment ON. --- ### 3. Connection & Implementation To use this part in an electronic circuit, the following considerations are vital: #### Current Limiting Never connect the segments directly to a power source. You must use **current-limiting resistors** (typically 220Ω to 470Ω for 5V logic) to prevent the LEDs from burning out. #### Driving Code Example (Pseudocode) ```cpp // Example: Displaying '1' on Digit 1 digitalWrite(DIGIT_1, HIGH); // Select Digit 1 digitalWrite(SEG_B, LOW); // Turn on Segment B digitalWrite(SEG_C, LOW); // Turn on Segment C delay(5); // Brief delay for persistence of vision digitalWrite(DIGIT_1, LOW); // Deselect Digit 1 ``` --- ### 4. Part Number Breakdown * **FYA:** Manufacturer Series Prefix (typically "FORYARD"). * **R32:** Refers to the physical size (0.32-inch digit height). * **19:** Internal design code/revision. * **ZX:** Color and Polarity code (Z usually denotes the color code, X denotes the polarity).